Math Problem Statement

The manufacturer of a fertilizer guarantees that, with the aid of the fertilizer, 65% of plantesl seeds will germinate. Suppose the manufacturer is correct. If ? seeds planted with the fertilizer are randomly selected, what is the probability that at least 6 of Item germinate?

Carry your intermediate computations to at least four decimal places, and round your answer to two decimal places.

Solution

To solve this problem, we'll use the binomial distribution, which models the number of successes (in this case, germinating seeds) in a fixed number of trials (seeds planted) with a constant probability of success on each trial.

Given:

  • The probability of a seed germinating (pp) = 0.65
  • The number of trials (nn) is not provided, so we will use nn as a variable.
  • We are asked to find the probability that at least 6 seeds germinate.

The probability that exactly kk seeds germinate out of nn seeds is given by the binomial probability formula:

P(X=k)=(nk)pk(1p)nkP(X = k) = \binom{n}{k} p^k (1-p)^{n-k}

Where:

  • (nk)=n!k!(nk)!\binom{n}{k} = \frac{n!}{k!(n-k)!} is the binomial coefficient.
  • pp is the probability of success (0.65 in this case).
  • 1p1-p is the probability of failure (0.35 in this case).
  • XX is the random variable representing the number of successes.

To find the probability that at least 6 seeds germinate, we need to sum the probabilities from 6 to nn:

P(X6)=k=6nP(X=k)P(X \geq 6) = \sum_{k=6}^{n} P(X = k)

However, since the value of nn (the number of seeds) is not provided, we cannot calculate a numerical answer. If you provide the value of nn, I can compute the exact probability.

Would you like to provide the value of nn or do you want to explore more details?

Relative Questions:

  1. What is the value of nn in your problem?
  2. Do you need help understanding the binomial distribution?
  3. What is the significance of the 65% germination rate in other contexts?
  4. How would the probability change if pp were different?
  5. How do you calculate factorials in the binomial coefficient?
  6. Why is it necessary to compute intermediate values to four decimal places?
  7. What does it mean to "round your answer to two decimal places"?
  8. Can this problem be solved using a normal approximation?

Tip: When dealing with binomial probabilities, understanding the concept of "at least" can be made easier by considering the complementary probability (i.e., using P(X<6)P(X < 6)).

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Math Problem Analysis

Mathematical Concepts

Binomial Distribution
Probability Theory

Formulas

Binomial probability formula
Binomial coefficient

Theorems

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Suitable Grade Level

Advanced High School